Question

Which of these numbers is not a natural number?

• A. $1$
• B. $3$
• C. $0$
• D. $6$

Answer 1

The correct option is C $0$

Natural numbers are the counting numbers. They start from $1$, and increases in steps of $1$.
Basically, the natural numbers are $1,2,3,4$... and so on.
Thus, in the given list, $0$ is not a natural number.